Mechanical stoker.



No. 761,685. i I PATENTED JUNE 7.1904.'

J. W. KINGAID. 5 MECHANICAL .ST.0'KER.

4 APPLIOATION rum: ma. 14. 1901. no 11011111.. 2 sums-s111121' 1.

' mlm PATBNTBD JUNE 7, 1904.I

ANo. 761,685.

J.` W.- KINCAID.

MECHANICAL STOKBR.- PBLIOATI'OH FILED LUG. 14, 19.01.

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NO MODEL.

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UNITED STATES Patented June 7, 19o/1.

JOHNV. KINOAID, OF COVINGTON, KNTUOKY.

MECHANICAL sToKER.

SPECIFICATION forming part cf Letters Patent No. 761,685, dated June "i, 1904.

4 Application filed August 14, 1901. I

T LZZ whom t may 007720077@ Be it known that I, JOHN WV. KINGAID, a citizen of the United States of America,and a resident of Oovingtomin the county of Kenton and State of Kentucky, have invented certain new and useful Improvementsy inl Mechanical Stokers, of which the following is a specification. o j v l The objectof my invention is amechanical stoker which feeds coal into a furnace and disperses it to all parts thereof by means of blasts of steam. v

In the accompanying drawings, in which like parts are indicated by similar referenceletters wherever they occur throughout the various views, Figure 1 is a central longitlidinal sectional view of a mechanical Stoker embodying my invention, taken upon line :n .fr of Fig. 2.

Fig. 2 is a horizontal sectional view taken upon line 1/ y, Fig. 1. Fig. 3 is an end elevation, the lower end of the rear journal-plate being broken off to expose the gearing in front of it. Fig. 4C is a vertical transverse sectional view taken upon linee a, Fig. 2. -Fig. 5 is an inverted detail perspective view of the stem of the valve which-controls the admission of steam into the steam-chamber. Fig. 6 is a detail perspective view of the valve.

Referring to the parts, A is an inclosed channel which is secured at one of its ends to door B of a furnace above the grate-bars and at the other en d to a steam-chamber C, which has in its floor a port c, from which achannel c leads into the bottom of channel A, which dares outward from the point where it meets channel 0', as shown in Fig.' 2, said flaring portion coming vertically below an openingjl in a fuelhopper F, which is situated above chamber O.

The opening and closing of port c is controlled by aflat rectangular slide-valve c2, having an opening 03 in it of the size of port 0 and having four vertical flanges cl upon its sides.

The admission of steam into chamber O is controlled by a cylindrical piston c5, which reciprocates in a cylindrical chamber 07, which is formed in the walls of chamber O and which has horizontal channels 08 cut into its walls. Channels es run inward from the outer end of chamber c7, but end a distance from the inner end thereof, so that when piston c5 is in Serial No. 71,990. (No model.)

its inward position it covers said channels and cuts off the admission of steam into the chamber until the piston returns to its outward position, uncovering the channels and again admitting steam into the chamber C.

Piston c is secured to the endof a horizontal piston-rod 0, the opposite end of which terminates in a piston 010, which reciprocates in a chamber c11 in the walls of chamber O. Piston-rod c" is bent downward to form a yoke or frame 012, which fits within flanges c* of slidevalve c2.

Journaled in the front and back walls of chamber O is a longitudinal shaft D, which has secured upon itapiniond, which meshes with a transverse worm E, to which a uniform rotation is imparted by two auxiliary steam-engines d and d2, the cylinders of which are secured to the exterior walls of chamber C.

Shaft D within chamber O carries a pinion d3, which has a series of cam-shaped teeth whose apices are upon the circumference of a circle and whose radial faces df, d5, d, and Z7 vary vgradually in length from a maximum to a minimum.' Pinion Z3 projects down into yoke 0m, so that its teeth engage shoulder l013. When in the rotation of pinion Z3 the apices are contacting shoulder cl3, opening 03 in valve c2 is carried to the left of port 0, (see'Fig. 4,) so that it is closed, and piston c5 uncovers channels o8, admitting steam to chamber C. When the apices pass the shoulder, the pressure of steam against the exterior face of pisrushes from chamber O out through portie and channel c', carrying the fuel from channel A into the furnace. .The rapidityV with vwhich it carries the fuel forward and the point door c, which hangs down over channel c' when port c is closed and when said port is opened is thrown up by the inrushing steam to cover opening f and prevent steam blowing into the hopper.

The valves which control the entrance of steam to engines Z/ and (Z2 are reciprocated by rods e e', which are coupled to opposite ends of the shaft of worm E by cams c2 c3.

Journaled in the ends of hopper F is a longitudinal spiral conveyer f for feeding the coal toward the front end of the hopper. Upon its rear end shaft f2 of said conveyer has a gear-wheel f3, which meshes with a gear-wheel d upon the rear end of shaft D. Since the frequency with which steam is allowed to pass from chamber C into channel A is controlled by the rate of rotation of shaft D and the rate of rotation of conveyer f can be made to bear any proportion desired to that of shaft D by regulating the sizes of gearwheelsf 3 and (ZS, the amount of fuel deposited in channel A and the rate at which it is thrown into the furnace can be regulated to any degree desired.

What I claim isy 1. In a mechanical Stoker the combination of a steam-chamber, a channel leading thence into a furnace above the grate-bars, a port in the chamber for admitting steam into the channel, a valve for regulating the opening of the port, a hopper above the channel for feeding fuel into it, means for admitting steam into the chamber and means for intermittently opening the valve to carry the fuel into the furnace substantially as shown and described.

2. In a mechanical Stoker the combination of a steam-chamber, a channel leading from the chamber into a furnace, means for feeding fuel into the channel, a valve for regulating communication between the channel and the steam-chamber, a Valve for regulating the admission of steam to the steam-chamber and means for operating the two valves whereby when one is opened the other is closed, suhstantially as shown and described.

3. In a mechanical stoker the combination of a channel leading into a furnace, means for feeding fuel into the channel, means for ad-` mitting intermittent blasts of steam into th(` channel to carry the fuel into the furnace, and means for varying the strength of the successive blasts automatically, substantially as shown and described.

4. In a mechanical stoker the combination of a steam-chamber, a fuel-channel leading thence into a furnace, a steam-channel fernling communication between the fuel-channel and the chamber, a flat valve to control the opening of the steam-chanml, a piston-valve in the walls of the steam-chamber to control the admission of steam thereto, a yoke for cou pl i ng the flat and the piston valves, a shaft jmlrnaled in the steam-chamber, a pinion thereon with teeth varying in shape and engaging the yoke to open the steam-channel leading from the steam-chamber in varyingamounts at the same time to operate the piston-valve to close olf the' admission of steam to the steam-cliamher, and means for imparting a constant rotation to the shaft, substantially as shown and described.

5. In a mechanical stoker the combination of a steam-chamber, a fuel-channel leading` therefrom into a furnace, a hopper having` an opening above the fuel-channel, a spiral conveyer for feeding fuel toward the opening` in the hopper, a Valve for controlling the passage of steam from the steam-chamber into. the fuel-channel, a rotating shaft for operating the valve, means for rotating the shaft and means for coupling the shaft and the spiral conveyor, substantially as shown and described.

JOHN \V. KING/Ul).

Witnesses:

J. H. DAY, lV. F. MURRAY. 

